U.S. Clean Diesel Car Sales Increase 25% in 2014; Overall
U.S. Car Market is Up 4%

WASHINGTON -- July 10, 2014: U.S. clean diesel car sales have increased
25 percent during the first six months of 2014 while the overall U.S. car
market has increased by 4.2 percent, according to data compiled by Hybrid
Cars.com and Baum and Associates.

The 2014 clean diesel sales total includes six months of consecutive
sales increases, including double digit increases in March (+ 39.5%), April
(+ 60.4%) and May (+26.8%). June 2014 was the 43rd monthly increase in
clean diesel sales in the past 47 months, with 31 of those months
registering double-digit increases.

2014 Clean Diesel & Hybrid Car
Sales

Vs. 2013 Monthly Sales

Jan.
2014

Feb. 2014

March 2014

April 2014

May 2014

June 2014

*Clean
Diesels

+ 6.8%

+ 4.5%

+39.5%

+60.4%

+26.8%

+
8.8%

Hybrids

(-20.4%)

(-23.9%)

(- 5.5%)

(- 7.9%)

+ 6.6%

(-12.7%)

Overall
Market

(- 3.0%)

(- 0.1%)

+ 5.6%

+ 8.0%

+11.2%

+
1.1%

(Diesel car and SUV
markets only - does not include light duty pickup trucks or vans.) (Source:
Hybrid Cars.com and Baum and Associates)

"Sustained and mostly double-digit increases in sales each month over a
four year period prove that U.S. consumers are embracing the benefits of
clean diesel technology and its proven, high fuel efficiency, great driving
performance, and long-term value," said Allen Schaeffer, the Executive
Director of the Diesel Technology Forum.

"The consistently positive sales trends for clean diesel are
particularly noteworthy since they have occurred over a recessionary
economic period when diesel fuel prices have trended upward, and consumers
have many more fuel efficient vehicle choices than ever before. Today, the
clean diesel choices include 27 cars and SUVs, nine vans and 10 pickup
trucks. We expect that number to nearly double in the next 18 months, and
we expect that more models in more brands will only generate higher sales
in the future.

"While diesel cars and pickup trucks make up only three percent of the
overall U.S. vehicle market, most analysts predict continued growth in the
U.S., with many believing the diesel market will double by 2018."

The Hybrid Cars.com/Baum and Associates sales information follows data
compiled by IHS Automotive for the Diesel Technology Forum released last
month that showed clean diesel vehicle registrations (cars, SUVS, vans and
pickups) had increased by 30 percent from 2010 through 2013.

Diesels Have 30% Better Fuel Efficiency Than Gasoline Vehicles

Schaeffer said Americans are seeking more fuel efficient cars and are
learning that clean diesel vehicles are about 30 percent more fuel
efficient that gasoline equivalents. In addition, he said the new federal
fuel efficiency standards that will require a 54.5 mpg average by 2025 will
also boost clean diesel auto sales, as auto manufacturers introduce more
diesels in the U.S. to help meet these standards.

To see a list of all clean diesel cars and pickups available in the
U.S., a list of all the new diesels coming to the U.S. market, and fuel
efficiency data go here: Clean Diesel Cars